Welcome to the Community!
We were able to check your account and can confirm that you should still be able to activate the roaming, since the service is not yet cancelled.
You may refer to this article for the guide: How to activate International Roaming
If you still unable to activate the roaming, please send me a PM with the screenshot or picture of the options appearing on your screen for us to report this further.
Thanks for the reply, I have sent you a PM with a screenshot showing that the only button visible is the Mobile Usage button and no option for Mobile Service Control Panel.
Look forward to your reply.